/**
 * AiScript interpreter
 */
import { Scope } from './scope';
import { Value, VFn } from './value';
import { Node } from '../node';
export declare class AiScript {
    private vars;
    private opts;
    stepCount: number;
    private stop;
    scope: Scope;
    private abortHandlers;
    constructor(vars: AiScript['vars'], opts?: AiScript['opts']);
    exec(script?: Node[]): Promise<void>;
    execFn(fn: VFn, args: Value[]): Promise<Value>;
    static collectMetadata(script?: Node[]): Map<any, any> | undefined;
    private log;
    private collectNs;
    private collectNsMember;
    private _fn;
    private _eval;
    private _run;
    registerAbortHandler(handler: Function): void;
    unregisterAbortHandler(handler: Function): void;
    abort(): void;
}